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Best Free & Open Source Alternatives to Harvest

Compare 3 open-source Harvest alternatives including Solidtime, Kimai and TimeTracker

If you're looking for the best open-source alternative to Harvest, Solidtime is a strong place to start. If it doesn't quite fit your needs, there are plenty of other great options worth exploring, including Kimai and TimeTracker. We've ranked the top alternatives to help you compare your options and find the right fit.

#1 Solidtime

Solidtime

Modern, open source time-tracking app for freelancers and teams with project, client, task, and reporting features.

Solidtime is a modern open source time-tracking application built for freelancers, agencies, and small teams. It is a popular Toggl Track and Harvest alternative with a clean interface, real-time project dashboards, and a focus on accurate billing.

You can organize work by projects, tasks, and clients, log time via a one-click timer or manual entries, and generate reports for invoicing and productivity analysis. Native integrations exist for importers from other time trackers, and a REST API is available for custom workflows.

Solidtime runs as a Docker-based Laravel application with Vue on the front end, is released under AGPL-3.0, and can be self-hosted on your own infrastructure. A managed cloud edition is also available for teams that prefer not to operate their own server.

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#2 Kimai

Kimai

Open source time-tracking application for freelancers, teams, and organisations, with timesheets, invoicing, and detailed reports.

Kimai is a free, open source time-tracking application that has been actively maintained for almost two decades. It is a popular alternative to Toggl Track, Harvest, and Clockify for freelancers, agencies, and small companies that want to track billable hours and generate invoices.

Kimai offers a web-based multi-user interface, projects and activities with hourly rates, customer and team reports, JSON API for integrations, and a powerful plugin system. It supports exporting to PDF, XLSX, CSV, and direct invoicing workflows. A self-hosted community edition is fully free, while the vendor offers a SaaS option and optional paid support contracts.

It is built on PHP, Symfony, and Doctrine, runs on MySQL or MariaDB, and is released under AGPL-3.0. Kimai is translated into dozens of languages and is a mature, well-documented choice for time tracking without a subscription.

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#3 TimeTracker

TimeTracker

A robust, self-hosted time tracking application designed for teams and freelancers who need reliable time management without cloud dependencies. Built with Flask and optimized for Raspberry Pi deployment, TimeTracker provides persistent timers, comprehensive reporting, and a modern web interface.

🕒 TimeTracker

TimeTracker is a lightweight, self-hosted time tracking system built with Flask and Docker.
Designed to run smoothly on devices like a Raspberry Pi, it gives you full control over your data while keeping things simple and reliable.


✨ Features

  • Persistent Timers – timers continue running even if you close the browser or restart your device
  • 📂 Projects & Clients – organize your work by project and client
  • 👥 User Roles – manage multiple users with different access levels
  • 💵 Billing Support – track time with hourly rates for easy invoicing
  • 📊 Reports & Exports – generate reports and export data to CSV
  • 📝 Manual Time Entries – add time blocks manually when needed
  • 🐳 Dockerized Deployment – quick setup with Docker
  • 🍓 Raspberry Pi Ready – optimized for running on low-power devices

🚀 Why Use It?

Most popular time tracking solutions (like Toggl Track, Harvest, or Clockify) are cloud-based.
TimeTracker is a privacy-friendly alternative:

  • ✅ Self-hosted — you control your data
  • ✅ Runs anywhere — from a local server to a Raspberry Pi
  • ✅ No external dependencies — works fully offline
  • ✅ Open source — free to use and extend
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Frequently Asked Questions

Are there any open source alternatives to Harvest?

Yes, there are 3 open source alternatives to Harvest. Popular options include Solidtime, Kimai, TimeTracker. These alternatives are free to use and many offer self-hosting options.

What is the best free alternative to Harvest?

The best free alternative to Harvest depends on your specific needs. Solidtime is a popular choice with self-hosting capabilities. All alternatives listed here are open source and free to use.

Can I self-host an alternative to Harvest?

Yes, 2 of the alternatives listed here can be self-hosted, giving you complete control over your data and privacy.

Why should I switch from Harvest to an open source alternative?

Open source alternatives to Harvest offer several advantages: no vendor lock-in, complete data ownership, no subscription fees, the ability to self-host for privacy and security, and active community support. You can also customize the software to fit your specific needs.

Harvest

Harvest

Harvest is an elegant cloud-based time-tracking and invoicing platform that empowers teams and freelancers to monitor hours, expenses, budgets, and profitability—all in one place. Accessible via web, desktop, and mobile apps, it simplifies logging time with timers or manual entries, sends reminders, integrates seamlessly with tools like Asana, Slack, Stripe, and PayPal, and transforms tracked work into professional invoices with customizable templates and payment support. Rich visual reports help teams stay productive, avoid burnout, and manage project budgets effectively—all while keeping operations smooth and billable.

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